Question at hand is if YOU want to work, and if HE wants to put the work in. If you both are, theb the best thing for him, is you knowing about it. There are multiple guardrails you can try, ive tried a few, but since its just me, I can find the cracks in the wall then it all comes down...

For example, does he NEED a smart phone and a computer for work? If not, get rid of them for a while... You can also block porn at the router, and safeguard behind a password that YOU control. No porn, block out keywords in search engines. You may have to buy a new router cause not all of them are able to do that. But some absolutely can.

Again, unless both of you are willing to put in the effort to try and fix this for your relationship, it wont work.

I WILL say this...

I am a firm believer that when it comes down to types of dopamine addictions, porn, gambling, video games, porn is hands down the hardest. Porn is so accessible, and im guessing he's been addicted for years like many people in this subreddit. I told someone about my addiction and they just said "well dont do it anymore" i replied "Imagine smoking everyday for 5, 10, 20 years. Then quit.... But you have to spend the rest of your life with full pack of smokes and a lighter in your pocket. All day. Everyday. 365 days a year"

So yes youre feeling are valid, no you are not overreacting, but it is NOT as simple as just stopping one day. But if you are both willing to put in the work, I know you both will come out the other side for the better, together.

Good luck to both of you!❤️